Mixer



A: MoYER MIXER Filed June 12, 1928 y Y /Z fij INVENTOR /l/berf-/Woyer ATTORNE'Z i I tati-ng or stirring *blades or paddles.

Patented Dec. 4, 1928.

UNITED STATI-:s

ALBERT NOYER, OF NEW N. Y.

MIXER.

Application .filed June 12,

This invention relates to mixers particularly adapted'for use in mixing the ingredients of concrete.

At the present time there is a tendency in concrete practice to use a stid mix and the mixers now available are not adapted to handle or effect the thorough intermixing of the relatively dry ingredients of a stiff mix of concrete.

This invention has for its salient object to provide a mixer so constructed and arranged that relatively stiff or` dry mixtures of materials will be thoroughly agitated and intermixed therein.

Further objects of the invention will appear from ,the following specification taken in connection with the drawings, which form a part of this application, and in which Fig. 1 is a sectional elevation Vof a mixer constructed in vaccordance with lthe invention;

Fig. 2 tisan lend elevation, partly in section, of .one end of the mixer shown in Fig. l;

Fig. 3 isa detail sectional elevation showing Aa sliehtly modified form of driving connection orreciprocating the shaft in the mixer; `and Fig. 4 is a view similar to Fig. '3 but illustrating another form .of driving connection.

The invention hrieiiy described consists of ,a lliixer comprising a rotary Adrum having ,a shaft disposed vtherein provided with agi- The Adrum `is operatively connected to driving connections whereby the drum can be rotated in .one Adireetion'and driving connections are also provided for rotating the shaft in a direction opposite .to ,the direction of rotation of the drum. In order Ato effect a thorough agitation and intermixing of the ingredients in the drum, the shaft is reciprocated during its rotation, thus causing the stirrers or paddles to move longitudinally of the drum axis as well as in a rotary path.

Further details of the invention will appear' from the following description.

In the form of the invention shown in Fig.

Y 1, the drum l0 has secured to the outer surface thereof, annular bands 11 andV 12 having flanges 13 and 14. The 'drum is mounted on two sets of rollers 15 and 16 which engage the bands 11 and 12. The rollers are carried by uprights 18 and 19 mounted on a base 20. One set of rollers is mounted on a shaft 25 supported in bearings 26 and 27 and driven Aa spherical socket 58 ofla block 192s. serial No. 284,866

lfrom any suitable source of power. 'The 'i as shown at37 to a shaft 37 slidably mounted in the shaft 35 and driven gby a sprocket and chain connection 38, 39 and 40 from the shaft 25. It will-be obvious that the shaft 37 1s driven in a direction opposite Lto the Vdirection of drive .of the drum 10. I

The hollow shaft 35 has lsecured thereto la plurality of radially extending arms 45 on `which are mounted paddles -or blades 46 for agitating and mixing the ingredients in the drum.

In addition to beingrotated, the isha-ft 35 is also reciprocated back and 4forth in the drum. Inthe form'ofgthe invention illustrated yin Fig. 1, thisjs accomplished by `means of a bell Vcrank lever pivoted at v50 Lto an upright 51. One arm 52 of thebell crank `lever has the end 53 thereof disposed i-n a cam groove 54 of a Cam 55 mounted on the Ashaft 25. The cam groove -is eccentric tolthej axis of rotation of the shaft 25 and causes .the'arm 52 and the hell crank lever to oscifl'late."back and forth on the pivot 50 during the rotation of the cam. l Y

The other arm 52 of the bell crank 'lever is connected toa link V56 having .a :ball `5;7.on the free-end thereof. The-tbalfl '57 is/disposed in Y 59 secured in one endofzthe hollow shaft 35.

It will be clear from the foregoing description that as the shaft 25 is rotated, the cam will oscillate the bell crank lever, thus imparting a reciprocatory movement to the hollow shaft 35. The shaft will, however, be rotated simultaneously with its rotation by means of the splined connection 36 with the shaft 37.

The material to be mixed is introduced inte the receptacle 10 through an opening therein normally closed by a door or removable plate 60. c

In the form of the invention illustratedin Fig. 3, the link 66 which corresponds to the link 56 shown in Fig. 1 is connected to an arm 67. The lower end of the arm 67 has lic secured thereto a nut or block 68 which is disposed ina groove 69 of a cylindrical cam 70. The cam 70 has right and left hand spiral threads therein and as the cam is rotated the nut 68 will follow the spiral grooves or threads and will cause the arm 70 to be reciprocated back and forth. Any suitable guiding means may be provided for guidingthe arm 67 during its reciprocation.

Fig. 4 illustrates another form of driving connection for reciprocating the hollow shaft 35. In this` form of the invention a fixed cam 75 is mounted in the end of the shaft 35. The cam 75 has a double spiral groove therein having right and left hand threads and the shaft has secured thereto and extending inwardly therefrom into the cam` groove, a lug or nut. A disk 77 is secured to one end of the cam 7,5 for centering the cam in the hollow shaft. Since the cam 75 is held against V turning, the rotation of the shaft 35 will cause the nut or lug 76 to follow the spiral grooves in the cam and to cause the 'reciprocation of the hollow shaft.

From the foregoing description it will be evident that simple and practical driving connections have been provided for a mixer of the type specified and by means of `the connections defined, the drum will be rotated in one direction and the centrally disposed member or hollow shaft will be rotated in the opposite direction. Furthermore, the hollow shaft will be reciprocated during its rotation, thus causing the paddles or blades to reciprocate back and forth in the rece tacle as well as to rotate therein. Due to tllie 'reciprocatory and rotary `motion of the blades,`an ecient and thorough agitation and intermixing of the material will be obtained.

Although certain specific embodiments of the invention have been particularly 'shown and described7 and several different forms of driving connections have been set forth, it will be obvious that changes in the construction and in the arrangement of the various cooperating parts and in the driving connections may be madeV Without departmg from the spirit or scope of the invention, as expressed in the following claims.

What I claim is:

1. A mixer comprising a rotatable receptacle, a rotatable member extending into thc receptacle, stirrers mounted on said member, and means for shifting said rotatable member axially during its rotation.

2. A mixer comprising a rotatable receptacle, a rotatable member extending into the receptacle, stirrers mounted on said member, and means for reciprocating said rotatable member axially during its rotation. r

3. A mixer comprising a rotatable receptacle, a rotatable member extending into the receptacle, stirrers mounted on said member, and means for reciprocating said rotatable member axially during its rotation in one direction. l

4. A mixer comprising a rotatable rece tacle, a rotatable member extending into the receptacle, stirrers mounted on said member, and means including a cam and operative connections actuated thereby for shifting said rotatable member axially during its rotation.

5. A mixer comprising a rotatable drum, a shaft extending axially through said drum, stirring `devices carried bythe shaft, means for rotating the drum, the shaft, and means for shiftin the shaft axially during the rotation thereo 6. A mixer comprising a rotatable drum, a Shaft extending axially through said drum, stirring devices carrie by the shaft, means for rotating the drum in one directiommeans for rotating the shaft in the opposite direc# tion, and means for shifting the shaft axially during the rotation thereof.

means for rotating y 7 A mixer comprising a rotatable drum,4

a shaft extending axially through said drum, stirring devices carried by the shaft, means for rotating the drum in one direction, means for rotating the shaft in theopposite direction, and means for reciprocatin the shaft axially during the rotation thereo In witness whereof, I have hereunto set my hand this 4th day of J une, 1928.

l ALBERT MOYER. 

